1-alkynols to give hydroquinone and/or vinyl lactone derivatives. Vinylketenes are found to be common intermediates formed by regioselective coupling of alkyne, carbene and carbonmonoxide components. Their ring closure is controlled by the carbene ligand and the length of the alkyne chain.
Chemistry of di- and tri-metal complexes with bridging carbene or carbyne ligands. Part 6. Synthesis of platinum–chromium and –tungsten compounds. X-Ray crystal structure of [(Me<sub>3</sub>P)(OC)<sub>4</sub>W{µ-C(OMe)C<sub>6</sub>H<sub>4</sub>Me-4}Pt(PMe<sub>3</sub>)<sub>2</sub>]
作者:Judith A. K. Howard、Kevin A. Mead、John R. Moss、Rafael Navarro、F. Gordon A. Stone、Peter Woodward
DOI:10.1039/dt9810000743
日期:——
PR3= PMe3 or PMe2Ph), characterised by 31P and 1H n.m.r. spectroscopy. The compounds [(OC)5[graphic omitted](PMe2Ph)2], [(OC)5[graphic omitted](PMe2Ph)2], and [(OC)5[graphic omitted](PMe3)2] were similarly obtained from [WC(OMe)Me}(CO)5], [Cr([graphic omitted]H2)(CO)5], and [W(CPh2)(CO)5], respectively. Although [PtW(µ-CPh2)(CO)5(PMe3)2] is a relatively unstable complex, reaction with trimethylphosphine
Nucleophilic addition of chromium and tungsten carbene anions to cationic organotricarbonylmetallic complexes
作者:Francoise Rose-Munch、Claudine Le Corre-Susanne、Frédéric Balssa、Eric Rose、Jacqueline Vaisserman、Emanuela Licandro、Antonio Papagni、Stefano Maiorana、Wie-dong Meng、G. Richard Stephenson
DOI:10.1016/s0022-328x(97)00157-5
日期:1997.1
Anions formed by deprotonation of alkoxy and amino Fischer carbene complexes of chromium and tungsten have been used as nucleophiles with η6 and η5 organotricarbonylmetal complexes of manganese and iron to form bimetallic organo-linked products, of which one has been studied by X-ray crystallography.
Correlation between thermal and mass spectral techniques for the characterization of allenylidene and carbene complexes
作者:Gehad G. Mohamed、Normen Szesni、Helmut Fischer
DOI:10.1016/j.saa.2007.11.024
日期:2008.11
The fragmentation pathways of allenylidene and carbene complexes have been studied using FAB mass spectrometry in comparison with thermal analyses (TGA, DrTG and DTA). Both the decomposition modes are investigated and the possible fragmentation pathways are suggested. The use of mass and thermal analyses (TGA and DTA) in the analyses of allenylidene and carbene complexes allowed the characterization
Reactions of alkynols with (alkynylalkoxycarbene)metal complexes (metal = chromium, tungsten)
作者:Antonia Segundo、Josep M. Moreto、Josep M. Vinas、Susagna Ricart、Elies Molins
DOI:10.1021/om00018a045
日期:1994.6
(Alkynylalkoxycarbene)metal complexes react with alkynols to give different types of products depending fundamentally on the substitution of the triple bond (mono- or disubstituted alkynes) and the spacing between the triple bond and the hydroxy functions.